Development geography is the study of how a region's people, land, resources, and environment are changing over time. It looks at how people are using resources, how the land is being developed and used, and how these changes affect the people and the environment. For example, development geography might look at how areas that have a lot of industry or development (like cities) are using up resources like water or electricity, and how that might be impacting the natural environment or people's health. It also looks at how different regions are growing and changing, which can help us understand how well those regions are doing in terms of economic growth and social progress.